Fermilab scientists and technicians working on radiofrequency
research and development for the Next Linear Collider
reached a milestone two weeks ago, when the final RF structure
to be used in a test of the X-band Linear Collider technology
was shipped to SLAC. In the upcoming "8-pack" test, the RF
structures will be used with high-power klystrons to demonstrate
the high-accelerating gradient performance of the technology.

"A successful 8-pack test will serve as a 'proof of principle'
of the fundamental elements of the NLC," said Project Engineer
Harry Carter. "Fermilab built six RF structures for the test,
four of which are installed in the 8-pack along with four
fabricated by SLAC and KEK."

The Fermilab team of technicians, engineers, physicists and a
mathematician has been working on the project for two
and a half years. RF design, mechanical design and assembly
and low-power testing are carried out at the lab's RF
structure factory in Industrial Building 4. Several
versions of the structures have been produced at the
lab, with one more version planned. The current version
is 60 cm long and contains 52 copper cells of slightly
different internal dimensions.

Highlights of the day include a special rescue re-enactment
by the Fermilab Fire Department, the Cryogenics Show with
Jerry Zimmerman in Ramsey Auditorium, Butterflies at Fermilab
with Tom Peterson and the buffalo pasture
visit with herdsman Don Hanson. These events are open
to all comers, and special DASTOW buses will provide transportation.
If you haven't signed up for the cafeteria lunch yet, please place your
orders today so we have an approximate count for ordering hot dogs.
And don't forget to smile for the official DASTOW Group Portrait
on the front steps of Wilson Hall at 8:50 a.m. An information desk will
be set up in the Atrium, where you can also register for education programs.

The Roads and Grounds Department will sponsor its annual
Earth Day tree planting and a picnic lunch beginning
at 11:30 a.m., so plan to bring your work clothes
and your appetite.

Remember, the No.1 priority for DASTOW and Earth Day is
for everyone to have a safe day. We look forward to seeing
you and your families tomorrow.
Schedule

Memorial Service for Harry Melanson
Harry Melanson, a Fermilab physicist on the DZero experiment,
died unexpectedly on Saturday, April 17. There
will be a memorial visitation on Saturday, April 24 from 9:30 a.m. to
11:30 a.m. at the Moss Family Funeral Home, 209 South Batavia Avenue in
Batavia. A service will be held from 11:30 a.m. to 12:30 p.m. Donations
should be given to the Batavia Community Chest, (630) 406-9219.

The caption of this "Grand
Opening of Wilson Hall Café" photo
on April 19 gave a wrong name. The photo shows
Hank Dreyer (right), Southern's
director of food operations at Fermilab, and Howie
Leighty (left), Southern's
director of catering at Fermilab.

From Scientific American, April 19, 2004:Shattered GlassSeeking the densest matter: the color glass condensate
By David Appell
Physicists investigating heavy-particle collisions believe they are on the track of a universal form of matter, one common to very high energy particles ranging from protons to heavy nuclei such as uranium. Some think that this matter, called a color glass condensate, may explain new nuclear properties and the process of particle formation during collisions. Experimentalists have recently reported intriguing data that suggest a color glass condensate has actually formed in past work.
read more

Spring Fling Book Fair - April 21 & 22
Fermilab's Recreation Office will sponsor its "Spring Fling" Book
Fair, hosted by Books are Fun, in the Atrium on Wednesday,
April 21 from 10:00 a.m. until 6:00 p.m. and on Thursday,
April 22 from 7:00 a.m. until 3:00 p.m.

Free Osteoporosis Screening
Free osteoporosis screenings will be offered today
from 10:00-2:00 at these Meijer stores: 855 S. Randall Rd.
in St. Charles; 755 E. Boughton Rd. in Bolingbrook;
and 400 S. Randall Rd. in Algonquin. On Thursday,
April 22, screenings will be offered from
7:00-2:00 at the Meijer store located at 7000 W.
Forest Preserve Dr. in Norridge. Bring a friend!
more information

International Folk Dancing
International Folk Dancing will be held at 7:30 p.m.
Thursday, April 22, at the Geneva American
Legion Post. Info at 630-584-0825
or 630-840-8194 or folkdance@fnal.gov.

Bible Exploration for Lunch
A pressure-free opportunity to
discover for yourself what the Bible says:
Join us today at noon in the Small Dining Room (WH-1SW).
Additional information at dykhuis@fnal.gov.

Microsoft Collaboration Tools Presentation at Fermilab
There will be a Microsoft Collaboration Tools presentation at Fermilab
today from 12:30 p.m. to 3:30 p.m. in One West.

Fermilab Association of Rocketry
The Fermilab Association of Rocketry is having its
monthly club meeting today at
5:00 p.m. in the lower level of the village barn. We will also
have one of our winter building sessions after the meeting.
So if you have something you want to build bring it
with you. Or just come, hang out and talk about rockets!
more information